EDIT:
So I figure I'll need one of these Honda>ISO:
http://www.ebay.com/itm/ISO-wiring-harness-for-Honda-stereo-convertor-HWH806-ISO-/200959637055?pt=Motorcycles_Parts_Accessories&hash=item2eca20b63f&vxp=mtrI think this is just the radio antenna, but could it be for the Reversing camera ?:
http://www.ebay.com/itm/Radio-Stereo-Factory-OEM-Reverse-Antenna-Adapter-car-audio-parts-HO-06-/200910073415?pt=LH_DefaultDomain_0&hash=item2ec72c6e47
There are still a few cables though..
probably for GPS antenna, satellite, VTR function, and the other stuff.